Problem with profile page

Have you tried deactivating your plugins to see if any are causing this problem?

Try deactivating ALL plugins and switching to a default theme.

Did you change something before it stopped working? Where did you get the theme? It does not appear to be a theme supported on these forums – which would be these:

http://ww.wp.xz.cn/themes/

That theme is evidently from a source/site that does not comply with the GPL licensing requirements of WP – so it’s not supported here at all. I’d strongly suggest that you read this article and find a better theme ASAP.